// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init({
  env: 'applet-work-2grfv6s9025afe0b'
})

// 云函数入口函数
exports.main = async (event, context) => {
  const wxContext = cloud.getWXContext()
  const db=cloud.database();
  const studentCollection =db.collection('student')
  let choosen =event.user.choosen;
  let _id =event.user._id;
  let res =await studentCollection.where({
    _id
  }).update({
    data:{
      choosen
    }
  })
  return {
   res
  }
}